How to Make an RC Helicopter Remote: DIY Transmitters and Binding
You can make an RC helicopter remote in two practical ways. The DIY route builds a transmitter from an Arduino, joysticks (gimbals) and a radio module such as an nRF24L01, matched to a receiver you also build or one that uses the same protocol. The more practical route for existing toy and hobby helicopters is a hobby transmitter with a multi-protocol module (or OpenTX/EdgeTX radio with one), which can bind to many toy helicopters’ own protocols. Either way, failsafe and safe testing matter.
By Kyle HilsonUpdated: October 20264 min read
Options
| Approach | Works with | Difficulty |
|---|---|---|
| Arduino + nRF24 transmitter | Your own receiver build | Medium |
| Multi-protocol module in a hobby radio | Many toy and hobby helis | Low–medium |
| Standard hobby radio + receiver | Hobby helis with servo inputs | Low |
| Phone/Bluetooth control | DIY builds | Medium |
DIY Arduino transmitter
- Get two 2-axis joysticks (or proper gimbals), an Arduino Nano and an nRF24L01 module.
- Read joystick values on analogue pins.
- Send them as a data packet over nRF24 several times a second.
- Build a receiver with a second Arduino and nRF24, outputting PWM or PPM.
- Program failsafe: if no packet arrives, cut throttle.
- Power from a LiPo with regulator; add a switch.
Arduino RC basics are in how to make an RC car with Arduino.
Multi-protocol modules
Many toy helicopters use their own protocols. Multi-protocol modules support dozens of them, letting one hobby radio bind to many toys. Check that your helicopter’s protocol is listed before buying. This is often easier than building a remote and gives far better control.
Binding
Binding pairs transmitter and receiver. Toy helis usually bind on power-up with a stick movement; hobby receivers use a bind button or bind plug. A “binding cable” mentioned in old manuals is often a bind plug (a jumper) placed in the receiver’s bind port. See how to connect an RC helicopter to a remote.
Safety
- Test with rotor blades removed.
- Implement and test throttle failsafe.
- Add a throttle-hold switch.
- Check range before flying.
- Follow radio frequency rules in your country.
Making a whole helicopter
Building a complete helicopter, including frame, motors and flight controller, is a bigger project, covered in how to make an RC helicopter and the electronics in how to make an RC helicopter circuit board.
Scale helicopters
People who ask who makes AH-64 Apache RC helicopters will find scale fuselages for hobby mechanics and ready-to-fly versions from several brands. These use standard hobby radios. See Horizon Hobby AH-64 Apache.
How many channels?
A toy coaxial helicopter needs three or four channels: throttle, yaw, pitch and sometimes roll. A collective-pitch hobby helicopter needs at least six: throttle, collective pitch, aileron, elevator, rudder and a gyro gain or mode channel. A DIY remote for a hobby heli should therefore read two full gimbals and at least two switches, one of which is throttle hold. Plan the channel order to match your receiver or flight controller, and include trims or a way to set centre points in software.
Ready-made is often better
A basic hobby radio with EdgeTX costs less than many people expect and offers model memories, curves and failsafe. A DIY remote is best treated as a learning project.
Parts list
A basic build needs two Arduinos, two nRF24 modules with antennas, two gimbals, switches, a LiPo, a regulator, a case and wiring. Quality gimbals make the biggest difference to how it feels.
FAQ
Can I build my own RC remote?
Yes, with an Arduino, joysticks and a radio module.
Can one remote control many toy helicopters?
With a multi-protocol module, many can be supported.
What is a binding cable?
Usually a bind plug for the receiver’s bind port.
Do I need failsafe?
Yes; it should cut throttle if signal is lost.
More on this topic: the complete RC Helicopters guide covers the basics behind this article.
About 20 years in RC. Mostly boats in the NAVIGA Mini Eco Expert class, with many self-made parts; also a King Motor Baja 5B, a home-built electric plane, home-built nitro planes he has flown, and an RC helicopter. More about SwellRC
